Electron leh hole concept kha.pdf


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Diamond tan hian conduction leh valence band inkar khi 6 eV lai a ni a. Heti ang zat energy hi
electron tan neih theih a har a, electric field kan pek hmangin chuti ang zat chakna a nei a nih
chuan insulator chu a chhia ang a, chu chu insulator break down an tih kha a ni. Semiconductor
tan khian valence band khi a dang ang thoin electron khana luah vek a. Mahse band pahnih inkar
khi a tlem vet hung a ni. Mahse insulator angin conduction band-ah khian electron an awm lo ve
tho a. Mahse an band gap inkar erawh a zim ve thung a. Germanium tan phei chuan 0.6 eV chauh
a ni.
Entirnan Silicon kha ngaihtuah ta ila. Valence shell-ah electron pali an neih avangin an bul hnaia
atom dang awmte nen convalent band an siam thei a. A hnuaia kan tarlan ang hian zero Kelvin
ah chuan electron – te kha atom dang electron-te nen bond an siam a. Mahse lumna hmangin
emaw energy kan pek chuan valence band atangin conduction band lamah electron kha
awlsamtein an han chho thei ta a ni. Mahse valence band lamah khan hmun ruak a hnutchhiah
thung a.

Figure 2: Covalent bond an siam dan ( http://hyperphysics.phy-astr.gsu.edu/hbase/Solids/intrin.html)

Hmingthar lo lang ta e…
A chunga kan sawi ang khian electron chu conduction band lama a han chhoh khan valence band
lamah hmun ruak a hnutchhiah a. Chumi chu hole kan ti ta kha a ni a. Chu chu lumna(heat)
hmanga electron hole pair kan nei kan tih fo thin kha a ni ta a ni. A hnuaia figure 3na hi ngun
taka kan en chuan Si atom khan a bond ami electron a hlauh chiah khan kha atom khan proton a